Fuel injection
Fuel injection |
Injection times are controlled by a control module using a large number of parameters:
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engine load (mass air flow sensor)
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engine speed (crankshaft position sensor)
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engine temperature
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oxygen sensor
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etc.
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Injection timing can vary, so that for instance on a cold start fuel injection can be done with open inlet valves.
The length of time the injectors can be open varies from approx. 3 ms when idling to approx. 15 ms when fully loaded.